Shutdown linux machine by non root user

Shutdown/ Reboot linux machine by non root user
 
01. Create a group testgroup and a user test under this group
#  groupadd testgroup
# adduser -G testgroup test

02. Temporarily change permissions of /etc/sudoers, so you have write permission on this file:
# chmod u+w /etc/sudoers

03. Give the the Group and its users permission to execute the shutdown command by editing
/etc/sudors

# vi /etc/sudoers
Add the following Line:
%testgroup ALL= NOPASSWD: /sbin/shutdown

04. Remove the write persmission on /etc/sudoers file
 1 / 2Shutdown by Non-Root User
 
# chmod u-w /etc/sudoers
04. Any user of Group "testgroup" (i.e user test) can shutdown the Linux box by executing
following command
# sudo shutdown -h now